I think the part where he talks about how someone laughed at his jokes says it all.
I think his integrity hit him. People were laughing AT him rather than with him. And I think I know the people he was talking about.
You mean the white ppl laughing, or someone else specifically?
I think I heard him say along time ago, it hit him when he did a racial joke and some white guy laughed in a way he (Dave) felt was totally inappropriate. Then combine that with probably hundreds of white ppl who approach him saying lines from the stuff like the nikkar family sketch and Black White Supremecists sketch.
I don't wanna be THAT guy, but IMO, that stuff is good for Black ppl to laugh at....but it's not meant for white ppl to laugh at. As black ppl, we all know or have known ppl who ARE those characters Dave was playing and we laugh at them from a place of understanding that white ppl cannot understand.